Exam 12: Calculus Practice Questions

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An equation for the tangent line to the curve y=(x5+x1)5y = \left( x ^ { 5 } + x - 1 \right) ^ { 5 } at the point where x = 1 is

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D

If f(x)=(x+7ex)2f ( x ) = \left( x + 7 e ^ { - x } \right) ^ { 2 } ,then f(x)=x+7exf ^ { \prime } ( x ) = x + 7 e ^ { - x } .

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A company makes a certain product for $4 each and sells it for $8.If the company has overhead expenses of $10,000 per year,how many of its products must be made and sold to break even?

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C

The second derivative test reveals that f(x)=x44x2+1f ( x ) = x ^ { 4 } - 4 x ^ { 2 } + 1 has

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Evaluate xx2+2dx\int x \sqrt { x ^ { 2 } + 2 } d x .

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Differentiate: f(x)=x6+7f ( x ) = x ^ { 6 } + 7

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Money is transferred continuously into an account at the constant rate of $1,000 per year.Assume the account earns interest at the annual rate of 8% compounded continuously.Compute the future value of the income stream over a 5 year period.

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Solve the given equation for x. 6=5+9e3x6 = 5 + 9 e ^ { 3 x }

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Find the indicated limit if it exists. limx4x2x4\lim _ { x \rightarrow 4 } \frac { \sqrt { x } - 2 } { x - 4 }

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The function y = ln 6x is concave downward everywhere.

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Find the intervals of increase and decrease for f(x)=8x12x+10f ( x ) = \frac { 8 x - 1 } { - 2 x + 10 } .Round numbers to two decimal places,if necessary.

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x33x2+2xdx=x333x22+2lnx+C\int \frac { x ^ { 3 } - 3 x ^ { 2 } + 2 } { x } d x = \frac { x ^ { 3 } } { 3 } - \frac { 3 x ^ { 2 } } { 2 } + 2 \ln | x | + C

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Find the absolute maximum of the function f(x)=x3f ( x ) = x ^ { 3 } on the interval 12x1- \frac { 1 } { 2 } \leq x \leq 1 .

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Find the equation of the tangent line to the graph of f(x)=3xf ( x ) = \frac { 3 } { x } at the point (4,34)\left( 4 , \frac { 3 } { 4 } \right) .

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Find the equation of the tangent line to f(x)=4lnx3f ( x ) = 4 \ln x ^ { 3 } at x = e.

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The owner of an appliance store expects to sell 500 toasters this year.Each toaster costs her $6 dollars to purchase,and each time she orders a shipment of toasters,it costs $30.In addition,it costs $4 a year to store each toaster.Assuming the toasters sell out at a uniform rate and that the owner never allows herself to run out of toasters,how many toasters should be ordered in each shipment to minimize the annual cost? (Round any fractional amounts.)

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Determine where the graph of f(x)=x33x29x+1f ( x ) = x ^ { 3 } - 3 x ^ { 2 } - 9 x + 1 is concave down.

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Find the slope (if possible)of the line that passes through the given pair of points. (7,0)and (17,19)

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Find the points of intersection (if any)of the given pair of curves. y = x + 8 and y = 2x + 4

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An efficiency study of the morning shift at a certain factory indicates that an average worker who arrives on the job at 8:00 A.M.will have assembled f(x)=x3+5x2+16xf ( x ) = - x ^ { 3 } + 5 x ^ { 2 } + 16 x transistor radios x hours later.How many radios will such a worker assemble between 10:00 and 11:00 A.M.?

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